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Agata [3.3K]
3 years ago
8

Explain how the sun's position in the sky affects the length of shadows.

Physics
1 answer:
Sergeeva-Olga [200]3 years ago
7 0

Answer:

The position of the sun affects the size of a shadow. A person or object blocks more light when the sun is low in the sky. More blocked light makes shadows longer. ... The sky turns dark when your part of Earth spins away from the sun.

Explanation:

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Is the mechanical form of power different from the electrical form?
Artemon [7]

Yes there is a difference.

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The x-axis of a trajectory represents its _____.
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The x-acis of a trajectory represents its C
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A student writes, "A bird that is diving for prey has a speed of − 10 m /s ." What is wrong with the student's statement? What h
kompoz [17]

Answer:

Speed is a scalar quantity it has only magnitude. So in the given scenario the student actually described about the velocity.

Explanation:

In this situation, student is describing that the speed is -10 m/s. The speed with the negative sign is wrong because speed is a scalar quantity and scalar quantities have only magnitude, they do not have direction. So, his statement is wrong because he is describing the speed with the negative sign.

And also we know that velocity is a vector quantity, so it has magnitude as well as direction also. So in this situation, the student is actually want to describe the velocity because he is mentioning the magnitude in a particular direction.  

4 0
3 years ago
In a police ballistics test, 2.00-g bullet traveling at 700 m/s suddenly hits and becomes embedded in a stationary 5.00-kg wood
aksik [14]

Answer:

  • Here we use the conservation of momentum theorem.

  • m stands for mass, and v stands for velocity. The numbers refer to the respective objects.

  • m1v1 + m2v2 = m1vf1 + m2vf2

  • Since the equation is perfectly inelastic, the final velocity of both masses is the same. Let’s account for this in our formula.

  • m1v1 + m2v2 = vf(m1 + m2)

<u>Let’s substitute in our givens.</u>

(0.002 kg)(700 m/s) + (5 kg)(0 m/s) = vf(0.002 kg + 5 kg)

I assume you are proficient in algebra I, so I will not include the steps to simplify this equation.

Note that I have considered the bullet’s velocity to be in the positive direction,

The answer is vf = 0.280 m/s

3 0
3 years ago
A cylinder of gas at room temperature has a pressure . To p_{1} what temperature in degrees Celsius would the temperature have t
grandymaker [24]

In order to calculate the temperature, we need to know that temperature and pressure are directly proportional, that is, if the pressure increases, the temperature (in Kelvin) also increases in the same proportion.

So, first let's convert the temperature from Celsius to Kelvin, by adding 273 units:

\begin{gathered} K=C+273 \\ K=20+273 \\ K=293 \end{gathered}

Then, let's calculate the proportion:

\begin{gathered} \frac{P_1}{T_1}=\frac{P_2}{T_2} \\ \frac{p_1}{293}=\frac{1.5p_1}{T_2} \\ \frac{1}{293}=\frac{1.5}{T_2} \\ T_2=1.5\cdot293 \\ T_2=439.5\text{ K} \end{gathered}

Now, converting back to Celsius, we have:

\begin{gathered} C=K-273 \\ C=439.5-273 \\ C=166.5\text{ \degree{}C} \end{gathered}

So the temperature would be 166.5 °C.

6 0
1 year ago
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